Pets and other people should stay out of areas treated with Pendulum 3.3 EC Herbicide during application and at least until the product is dry. Often the primary reason for this is to make sure that walking around on the wet application does not disturb it, rather than because of health concerns. You may view all the product documents we have if you scroll down on the product page linked above.
Pendulum 3.3 EC - 2.5 Gallons is a pre-emergent herbicide that does not require an adjuvant/surfactant.
The first thing you need to know when using an herbicide such as Pendulum is that the exact amount of water you dilute it with is not important. It is only important to make sure you are using the correct amount of product per 1,000 sq ft of lawn. Use too much and you risk damaging your lawn, use too little and you will not get adequate results. You will need to use 1.3 - 1.8 oz of Pendulum per 1,000 sq ft of lawn. To decide how much water you want to use, you should mark a 1,000 sq ft area, fill your sprayer with water ONLY, and start walking and spraying just as if you were doing the actual application of herbicide. When you are done walking and spraying the 1,000 sq ft area note how much water it took you to spray that area, and that is the amount you will want to mix 1.3-1.8 oz of product with for each 1,000 sq ft area that needs to be treated. You will need to make sure treated areas are irrigated with at least 1/2 inch of water (either by rainfall or by sprinkler) following the application.
As long as Pendulum 3.3 EC was only frozen for a very short period of time, and if after it was thawed out it went back into a solution (the way it usually looks) it should be fine to use. However, if it appears that there are particles floating at the top, the product appears discolored, or the product will not go back into a solution, it should be discarded and replaced. Be mindful that Pendulum 3.3 EC should be kept out of extreme temperatures and kept in a room temperature environment out of direct sunlight.
Pendulum 3.3 EC - 2.5 Gallons is not labeled to be used in pastures where animals graze or is used for hay. We currently do not carry a pre-emergent herbicide labeled for this area and would recommend checking with your department of agriculture for a recommendation, if this is the use of the pasture.